Thursday, October 28, 2010

Shrinking Arctic Sea Ice Thinner, More Vulnerable

Using satellites to track sea ice as it moves around, scientists can keep tabs on specific patches of ice over several years and count the ice's age. With this method, they saw that perennial ice had reached a record low for the winter.

Through the 1980s and early 1990s, about 50 to 60 percent of the sea ice was perennial when the ice reached its largest extent in March.